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RESTRUCTURING CHARGES - Additional Information (Details)
$ in Millions
1 Months Ended 6 Months Ended 18 Months Ended
Dec. 31, 2016
job_position
Jun. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Restructuring Cost and Reserve [Line Items]      
Payments for restructuring   $ (14.1)  
EA Integration Restructuring Program      
Restructuring Cost and Reserve [Line Items]      
Number of positions eliminated | job_position 425    
Payments for restructuring   (12.9) $ (55.4)
EA Integration Restructuring Program | Minimum      
Restructuring Cost and Reserve [Line Items]      
Expected restructuring and related charges   90.0 90.0
Effect on future cash flows   90.0  
EA Integration Restructuring Program | Maximum      
Restructuring Cost and Reserve [Line Items]      
Expected restructuring and related charges   95.0 95.0
Effect on future cash flows   95.0  
EA Integration Restructuring Program | Employee-related costs      
Restructuring Cost and Reserve [Line Items]      
Payments for restructuring   (12.1)  
EA Integration Restructuring Program | Employee-related costs | Minimum      
Restructuring Cost and Reserve [Line Items]      
Expected restructuring and related charges   70.0 70.0
EA Integration Restructuring Program | Employee-related costs | Maximum      
Restructuring Cost and Reserve [Line Items]      
Expected restructuring and related charges   75.0 75.0
EA Integration Restructuring Program | Lease termination costs      
Restructuring Cost and Reserve [Line Items]      
Expected restructuring and related charges   10.0 10.0
EA Integration Restructuring Program | Other      
Restructuring Cost and Reserve [Line Items]      
Expected restructuring and related charges   10.0 $ 10.0
Payments for restructuring   $ (0.8)